Motor, rotary electric machine and its stator, and method for manufacturing the stator

Abstract

A laminated core segment 30 into which a stator core is split has a core main body 31 that extends in an arc shape. On one end section of the core main body 31 there is formed a connecting section 40 , and on the other end section there is formed a connecting section 41 . The connecting section 40 is able to connect with the connecting section 41 of another laminated segment 30 . In the connecting section 40 there is provided a protruding protrusion section 48 , and the protrusion section 48 interferes with an interference section 53 on the connecting section 41 side when the stator core 30 is forced towards the direction in which the stator core is split. As a result, an assembly operation of the stator core becomes easier, and a magnetically excellent connecting structure can be obtained.

1. A motor having a stator core formed by combining laminated core segments, which are laminated while said core segments are skewed, in a ring shape, wherein
 a convex section is provided on one end section in the circumferential direction of said laminated core segment, and a concave section is provided on the other end section in the circumferential direction so as to be able to connect in the circumferential direction to said convex section of another said laminated core segment, and said convex section and said concave section have interference sections that cause said convex section and said concave section to interfere with each other due to skewing in said laminated core segment when a force that acts to separate said convex section and said concave section is displaced from the circumferential direction. 
 
     
     
       2. A motor according to  claim 1 , wherein said interference sections are a protrusion section that partially protrudes between the tip end and the base end of said convex section, and an end section formed on said concave section so as to correspond to said protrusion section. 
     
     
       3. A motor according to  claim 2 , wherein said protrusion section protrudes from an imaginary line that passes through a corner section of the tip end of said convex section and that inclines by an angle half of a skew angle with respect to the circumferential direction so as to open towards the base end side of said convex section. 
     
     
       4. A motor according to any one of  claim 1  through  claim 3 , wherein said interference sections are formed respectively on the inner circumference side and on the outer circumference side of said convex section and said concave section. 
     
     
       5. A motor according to any one of  claim 1  through  claim 4 , wherein said interference sections have shapes that do not cause interference when said convex section and said concave section are moved in the circumferential direction. 
     
     
       6. A motor according to  claim 1 , wherein said motor is a rotary electric machine provided with a rotor having a permanent magnet and said stator arranged on the outer circumference side of said rotor, and said stator is provided with a plurality of laminated core segments arranged in a ring shape along the circumferential direction. 
     
     
       7. A motor according to  claim 6 , wherein each of said laminated core segments is formed by laminating a plurality of core pieces. 
     
     
       8. A stator of a rotary electric machine according to  claim 6 , wherein said laminated core segments are formed by splitting, along the circumferential direction, said stator core that is formed by laminating a plurality of ring-shaped plate members, and said stator is formed by re-connecting said laminated core segments, which have been split-formed from the same said stator core and which have individually had winding wires wound thereon, in a combination the same as that at the time of splitting. 
     
     
       9. A stator of a rotary electric machine according to  claim 8 , wherein said laminated core segments have arrangement displays that show the state of combination at the time of splitting. 
     
     
       10. A stator of a rotary electric machine according to  claim 7 , wherein said split core segments are formed by splitting, along the circumferential direction, said stator core that is formed by laminating a plurality of said ring-shaped plate members in which said core pieces are connected along the circumferential direction, and said core piece has connection sections that are cut-formed from a steel plate member by half-blanking said steel plate member, on which said plate member is formed, from one face side and then pressing it from the other face side, and said connection sections connect said core pieces adjacent to each other. 
     
     
       11. A stator of a rotary electric machine according to  claim 10 , wherein said connection section has engaging sections to and from which said core pieces can be attached or removed. 
     
     
       12. A stator of a rotary electric machine according to either one of  claim 10  and  claim 11 , wherein a cut-assisting hole is provided adjacent to a portion of said steel plate member in which said connection section is formed. 
     
     
       13. A manufacturing method of a stator of a rotary electric machine according to  claim 6 , wherein said split core unit is formed by splitting, in the circumferential direction, a stator core that is formed by laminating a plurality of ring-shaped plate members, and a winding wire is individually wound on said split core unit, and then said split core units, which have been split-formed from the same said stator core, are re-connected in a combination the same as that at the time of splitting to form said stator. 
     
     
       14. A manufacturing method of a stator of a rotary electric machine according to  claim 7 , wherein a ring-shaped plate member in which said core pieces are connected in the circumferential direction is punch-formed from a steel plate member, and said steel plate member is half-blanked from one face side and is then pressed from the other face side, thereby cut-forming from said steel plate member, connection sections in between adjacent said core pieces for connecting said core pieces, and said stator core is formed by laminating a plurality of said plate members, and said Stator core is split to form said laminated core segment. 
     
     
       15. A rotary electric machine according to  claim 6 , wherein said split core units are formed by splitting, along the circumferential direction, said stator core that is formed by laminating a plurality of ring-shaped plate members, and said stator is formed by re-connecting said laminated core segments, which have been split-formed from the same said stator core and which have individually had winding wires wound thereon, in a combination the same as that at the time of splitting. 
     
     
       16. A rotary electric machine according to  claim 7 , wherein said split core units are formed by splitting, along the circumferential direction, said stator core that is formed by laminating a plurality of said ring-shaped plate members in which said core pieces are connected along the circumferential direction, and said core pieces have connection sections that are cut-formed from a steel plate member by half-blanking said steel plate member, on which said plate member is formed, from one face side and then pressing it from the other face side, and said connection sections connect said core pieces adjacent to each other.